Data Sheet

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lFeatures lOutline

• 1608 standard size(1.6×0.8mm, t=0.8mm)

• Abundant color variations with diverse luminous intensity types

lSize

1006 (0402)

1.0×0.6mm (t=0.2mm)

lDimensions lRecommended Solder Pattern

lSpecifications

Typ. IF Max. VR Min. Typ. Max. IF Min. Typ. IF

(V) (mA) (mA) (V) (nm) (nm) (nm) (mA) (mcd) (mcd) (mA)

SML-310VT 2 20 625 630 635 20 1.4 4 20

SML-311UT 615 620 625 0.9 2.5

SML-311DT 1.6 3.15

SML-310DT 2 20 20 2.2 6.3 20

SML-311WT 587 590 593

SML-311YT

SML-310YT 2.1 2.2 6.3

SML-310MT 567 570 573 3.6 16

SML-310PT 557 560 563 1.4 4

SML312ECT 3.3 527 90 200

SML312EC4T 3.2 525 36 90

SML312BCT 3.3 63

SML312BC4T 3.2 46

*1 : Duty1/5, 200Hz *2 : Duty1/10, 1kHz

2.5

2

2

20

2

2

20

608

22

0.9

590

520 535

476470

100

4

5

602 605

464

584 587

AlGaInP

on GaAs

AlGaInP

on GaAs

GaAsP

on GaP

GaAsP

on GaP

GaAsP

on GaP

GaP

InGaN

Blue

Bluish

Green

Yellowish

Green

Green

Yellow

Orange

Red55

44

55

44

55

84

20

60*1

100*2 5

4

SML-31 Series

Part No.Chip

Structure

VR(V)

Color

Emitting

Current

Peak Forward

IFP(mA)PD(mW) IF(mA)

Operating Temp.

Electrical and Optical Characteristics (Ta=25ºC)

Voltage

Reverse Forward Voltag VF Reverse Current IR Dominant Wavelength lD Luminous Intensity IVStorage Temp.

Absolute Maximum Ratings (Ta=25ºC)

Power Forward

CurrentDissipation

Tstg(ºC)Topr(ºC)

2

2

20

-30 to +85

-40 to +100

-40 to +85

1.8

1.8

2.2

Tolerance : 0.1 (unit : mm)

(unit : mm)

1608(0603)

1.6×0.8mm(t=0.8mm) W M P E B

Color Type V U D Y

0.8

0.80.850.8

1/9 2014.12 - Rev.D

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Data SheetSML-31 Series

lElectrical Characteristics Curves

　

FORWARD VOLTAGE : VF [V]

100

10

12.0 2.51.0 1.5 3.0

1.4

1.2

1.0

0.8

0.6

0.4-40 -20 0 20 40 60 80 100

1.6

0 10 20 30 40 50 60

0

0.5

1.0

1.5

2.0

2.5

3.0

0

10

20

30

-40 -20 0 20 40 60 80 100

SML-310VT SML-310DT SML-310MT SML-310PT SML-310YT

Fig.1 Forward Current - Forward Voltages

FO

RW

AR

D C

UR

RE

NT

: I

F [

mA

]

Fig.2 Luminous Intensity -

Atmosphere Temperature

RE

LA

TIV

E L

UM

INO

US

IN

TE

NS

ITY

[a.u

.]

ATMOSPHERE TEMPERATURE : Ta [ºC]

Fig.3 Luminous Intensity - Forward Current

FORWARD CURRENT : IF [mA]

Fig.4 Derating

AMBIENT TEMPERATURE : Ta [ºC]

Ta=25ºC

f=1kHz

IF=20mA

SML-310VT SML-310DT SML-310YT SML-310MT SML-310PT

SML-310VT SML-310DT SML-310YT SML-310MT SML-310PT

SML-310VT SML-310DT SML-310YT SML-310MT SML-310PT

RE

LA

TIV

E L

UM

INO

US

IN

TE

NS

ITY

[a.u

.]

MA

XIM

UM

FO

RW

AR

D C

UR

RE

NT

: I

F [

mA

]

2/9 2014.12 - Rev.D

www.rohm.com© 2014 ROHM Co., Ltd. All rights reserved.

Data SheetSML-31 Series

lElectrical Characteristics Curves

　

100

10

1.0

1.0 1.5 2.0 2.5

0.1

1.4

1.2

1.0

0.8

0.6

0.4-40 -20 0 20 40 60 80 100

1.6

0.1 1 10 100

100

10

1.0

0.1 0

10

20

30

-40 -20 0 20 40 60 80 100

Fig.1 Forward Current - Forward Voltages

FO

RW

AR

D C

UR

RE

NT

: I

F [

mA

]

FORWARD VOLTAGE : VF [V]

Fig.2 Luminous Intensity -

Atmosphere Temperature

RE

LA

TIV

E L

UM

INO

US

IN

TE

NS

ITY

[a.u

.]

ATMOSPHERE TEMPERATURE : Ta [ºC]

Fig.3 Luminous Intensity - Forward Current

FORWARD CURRENT : IF [mA]

Fig.4 Derating

AMBIENT TEMPERATURE : Ta [ºC]

Ta=25ºC

Ta=25ºC

IF=20mA SML-311UT SML-311DT SML-311WT SML-311YT

SML-311UT SML-311DT SML-311WT SML-311YT

SML-311UT SML-311DT SML-311WT SML-311YT

SML-311UT SML-311DT SML-311WT SML-311YT

RE

LA

TIV

E L

UM

INO

US

IN

TE

NS

ITY

[a.u

.]

MA

XIM

UM

FO

RW

AR

D C

UR

RE

NT

: I

F [

mA

]

3/9 2014.12 - Rev.D

www.rohm.com© 2014 ROHM Co., Ltd. All rights reserved.

Data SheetSML-31 Series

lElectrical Characteristics Curves

　

100

10

12.5 3.0 3.5 4.0

1.4

1.2

1.0

0.8

0.6

0.4-40 -20 0 20 40 60 80 100

1.6

0

3

2

1

4

5

0 5 10 15 20 25 30

0

10

30

20

-40 -20 0 20 40 60 80 100

Fig.1 Forward Current - Forward Voltages

FO

RW

AR

D C

UR

RE

NT

: I

F [

mA

]

FORWARD VOLTAGE : VF [V]

Fig.2 Luminous Intensity -

Atmosphere Temperature

RE

LA

TIV

E L

UM

INO

US

IN

TE

NS

ITY

[a.u

.]

ATMOSPHERE TEMPERATURE : Ta [ºC]

Fig.3 Luminous Intensity - Forward Current

FORWARD CURRENT : IF [mA]

Fig.4 Derating

AMBIENT TEMPERATURE : Ta [ºC]

Ta=25ºC

Ta=25ºC

IF=20mA SML312BC4T SML312EC4T SML312BCT SML312ECT

SML312BC4T SML312EC4T SML312BCT SML312ECT

SML312BC4T SML312EC4T SML312BCT SML312ECT

SML312BC4T SML312EC4T SML312BCT SML312ECT

RE

LA

TIV

E L

UM

INO

US

IN

TE

NS

ITY

[a.u

.]

MA

XIM

UM

FO

RW

AR

D C

UR

RE

NT

: I

F [

mA

]

4/9 2014.12 - Rev.D

www.rohm.com© 2014 ROHM Co., Ltd. All rights reserved.

Data SheetSML-31 Series

lViewing Angle

lRank Reference of Brightness

SML-310 / SML-311 series SCANNING ANGLE (deg)

RELATIVE INTENSITY

SCANNING ANGLE (deg)

RELATIVE INTENSITY

10°10°20°20°

40°

50°

70°

80°

40°

50°

70°

80°

0 50 10050100

0°

30°

60°

90°

30°

60°

90°

YX 10°10°

20°20°

40°

50°

70°

80°

40°

50°

70°

80°

0 50 10050100

0°

30°

60°

90°

30°

60°

90°

Y’X’

SCANNING ANGLE (deg)

RELATIVE INTENSITY

SCANNING ANGLE (deg)

RELATIVE INTENSITY

10°10°20°20°

40°

50°

70°

80°

40°

50°

70°

80°

0 50 10050100

0°

30°

60°

90°

30°

60°

90°

YX Y’X’

10°10°20°20°

40°

50°

70°

80°

40°

50°

70°

80°

0 50 10050100

0°

30°

60°

90°

30°

60°

90°

SML-310 / SML-311 series

SML312BCT/ECT SML312BC4T/EC4T

SML312BCT/ECT SML312BC4T/EC4T

Red(V,U) (Ta=25ºC, IF＝20mA, *1 : IF＝2mA)

G H J K L M N P Q T W X

1.0 to 1.6 1.6 to 2.5 2.5 to 4.0 4.0 to 6.3 6.3 to 10 10 to 16 16 to 25 25 to 40 40 to 63 160 to 250 630 to 1000 1000 to 1600

Orange(D) (Ta=25ºC, IF＝20mA)

G H J K L M N P Q T W X

1.0 to 1.6 1.6 to 2.5 2.5 to 4.0 4.0 to 6.3 6.3 to 10 10 to 16 16 to 25 25 to 40 40 to 63 160 to 250 630 to 1000 1000 to 1600

Yellow(Y,W) (Ta=25ºC, IF＝20mA, *1 : IF＝2mA)

G H J K L M N P Q T W X

1.0 to 1.6 1.6 to 2.5 2.5 to 4.0 4.0 to 6.3 6.3 to 10 10 to 16 16 to 25 25 to 40 40 to 63 160 to 250 630 to 1000 1000 to 1600

Green (M, P, E) (Ta=25ºC, IF＝20mA)

G H J K L M N P Q T W X

1.0 to 1.6 1.6 to 2.5 2.5 to 4.0 4.0 to 6.3 6.3 to 10 10 to 16 16 to 25 25 to 40 40 to 63 160 to 250 630 to 1000 1000 to 1600

Blue (B) (Ta=25ºC, IF＝20mA)

G H J K L M N P Q T W

1.0 to 1.6 1.6 to 2.5 2.5 to 4.0 4.0 to 6.3 6.3 to 10 10 to 16 16 to 25 25 to 40 40 to 63 160 to 250 630 to 1000

* : Brightness on specif ication sheet include tolerance of w ithin ±10%.

SML-312BCT*

SML-312BC4T*

Iv (mcd) 63 to 100 100 to 160 250 to 400 400 to 630

Rank R S U V

SML-312EC4T*

SML-310MT*

SML-312ECT*

SML-310PT*

U

Iv (mcd) 63 to 100 100 to 160 250 to 400 400 to 630

Rank R S U V

250 to 40063 to 100

R

V

400 to 630

100 to 160

U

250 to 400

U

100 to 160

250 to 400

V

400 to 630

V

400 to 630

S

100 to 160

S

SML-311YT* /*1

SML-311WT* /*1

SML-310YT*

S

SML-311DT

Rank

Iv (mcd)

Iv (mcd)

Rank

Rank

Iv (mcd)

SML-311UT* /*1

SML-310VT*

R

63 to 100

R

63 to 100

5/9 2014.12 - Rev.D

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Data SheetSML-31 Series

lPart No. Construction

lPacking Specification

ROHM LED products are being shipped with desiccant (silica gel) concluded in moisture-proof bags.

Pasting the moisture sensitive label on the outer surface of the moisture-proof bags or enclosing the humidity indication card

inside the bag is available upon request.

Please contact the nearest sales office or distributer if necessary.

* Concerning the Brightness rank

• Please refer to the rank chart above for luminous intensity classification.

• Part name is individual for each rank.

• When shipped as sample, the part name will be a representative part name.

General products are free of ranks. Please contact sales if rank appointment is needed.

S M L 3 1 0 D T T 8 6

Special Code will be applied for

Emitting color B/E series.

* “-” will be taken out for

emitting color B/E series.

Series name Package type Chip Type Emitting Color Resin Color Taping Specifications Rank sign (Brightness Rank) *

0

1

Standard Type

Low Current Type

2 High Brightness Type

T86

T87

T Transparent Colorless Cathode at sprocket hole side

Reverse of T86W MilkyWhite

V

U

Y

W

M

P

E

Red:630nm

Red:620nm

Yellow:587(590)nm

D Orange:605nm

Yellow:590nm

Yellowish-Green:572nm

Green:560nm

Bluish-Green:527nm

B Blue:470(466)nm

K

6/9 2014.12 - Rev.D

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Data SheetSML-31 Series

2014.12 - Rev.D7/9

lPrecaution (Surface Mount Device)1.Storage

If the product is heated during the reflow under the condition of hygroscopic state, it may vaporize and expand which will influence the performance of the product. Therefore, the package is waterproof. Please use the product following the conditions:

• Using ConditionsClassification Temperature Humidity Expiration Date Remark

1 Before using 5 to 30ºC 30 to 70%RH Within 1 year from Receiving Storage with waterproof package

2 After opening package 5 to 30ºC Below 70%RH Within168h Please storing in the airtight container with

our desiccant (silica gel)

• BakingBake the product in case of below: 1 The expiration date is passed. 2 The color of indicator (silica gel) turned from blue to colorless or from green to pink. (Even if the product is within the expiration date.)

• Baking ConditionsTemperature Time Humidity

60±3ºC 12 to 24h Below 20%RH

Remark

• Bake products in reel.• Reel and embossed tape are easy to be deformed when baking, so please try not to

apply stress on it.• Recommend bake once.

2.Application Methods

2-1. Precaution for Drive System and Off ModeDesign the circuit without the electric load exceeding the ABSOLUTE MAXIMUM RATING that applies on the

products. If drive by constant voltage, it may cause current deviation of the LED and result in deviation of luminous intensity, so we recommend to drive by constant current. (Deviation of VF Value will cause deviation of current in LED.) Furthermore, for off mode, please do not apply voltage neither forward nor reverse. Especially, for the products with the Ag-paste used in the die bonding, there’s high possibility to cause electro migration and result in function failure.

2-2. Operation Life SpanThere’s possibility for intensity of light drop according to working conditions and environments (applied current,

surrounding temperature and humidity, corrosive gases), please call our Sales staffs for inquiries about the concerned application below.

1 Longtime intensity of light life 2 On mode all the time

2-3.Applied Stress on ProductThe top of the LED is very soft, which the silicon resin is used as sealing resin. Therefore, please pay attention

to the overstress on it which may influence its reliability.

2-4.UsageThe Product is LED. We are not responsible for the usage as the diode such as Protection Chip, Rectifier,

Switching and so on.

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Data SheetSML-31 Series

2014.12 - Rev.D8/9

3. Others3-1. Surrounding Gas

Notice that if it is stored under the condition of acid gas (chlorine gas, sulfured gas) or alkali gas (ammonia), it may result in low soldering ability (caused by the change in quality of the plating surface ) or optical characteristics changes (light intensity, chrominance) and change in quality of die bonding (Ag-paste) materials. All of the above will cause function failure of the products.

Therefore, please pay attention to the storage environment for mounted product (concern the generated gas of the surrounding parts of the products and the atmospheric environment).

3-2. Electrostatic DamageThe product is part of semiconductor and electrostatic sensitive, there’s high possibility to be damaged by the

electrostatic discharge. Please take appropriate measures to avoid the static electricity from human body and earthing of production equipment. The resistance values of electrostatic discharge (actual values) vary with products, therefore, please call our Sales staffs for inquiries.

3-3. Electromagnetic WavePlease concern the influence on LED in case of application with strong electromagnetic wave such as IH

(Induction heating).

4.Mounting4-1. Soldering• No resin hardening agent such as filler is used in the sealing resin of the product. Therefore, resin expansion

and moisture absorption at humidity will cause heat stress during soldering process and finally has bad influence on the product’s reliability.

• The product is not for flow soldering. • Do not expose the product in the environment of high temperature (over 100ºC) or rapid temperature shift

(within 3ºC of temperature gradient) during the flow soldering of surrounding parts.• Please set appropriate reflow temperature based on our product usage conditions and specification.• The max for reflowing is 2 times, please finish the second flow soldering and flow soldering with other parts

within the usage limitation after open the moistureproof package.• Compare with N2 reflow, during air reflow, because of the heat and surrounding conditions, it may cause the

discoloration of the resin.• For our product that has no solder resist, because of its solder amount and soldering conditions, one of its

specific characteristics is that solder will penetrate into LED. Thus, there's high possibility that will influence its reliability. Therefore, please be informed, concerning it before using it.

4-2. Automatic Mounting4-2-1.Silicon Resin Sealing Product

The sealing resin of LED is very soft, so please select adsorption nozzle that would not apply stress directly on the sealing section.

4-2-2.Mini Package (Smaller than 1608 size)Vibration may result in low mounting rate since it will cause the static electricity of product and adhere to top

cover tape. We recommend to• set magnet on parts feeder cassette of the mounter to control the product stabilization • set ionizer to prevent electrostatic charge

4-3. Mounting LocationThe stress like bending stress of circuit board dividing after mounting, may cause LED package crack or

damage of LED internal junction, therefore, please concern the mounting direction and position to avoid bending or screwing with great stress of the circuit board.

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Data Sheet

0.85mm

0.8m

m

0.8m

m PCB Bonding Direction

0.8mm

(Fig-1)

SML-31 Series

2014.12 - Rev.D9/9

4-5. Soldering Pattern for RecommendationWe recommend the soldering pattern that shows on the right. It will be

different according to mounting situation of circuit board, therefore, please concern before designing.

*The product has adopted the electrode structure that it should solder with back electrode of the product.

4-6. Reflow Profile For reflow profile, please refer to the conditions below:(*)

• Meaning of marks, ConditionsMark Meanings ConditionsTsmax Maximum of pre-heating temperature 180ºCTsmin Minimum of pre-heating temperature 140ºCTs Time from Tsmin to Tsmax Over 60sec.TL Reference temperature 230 to 260ºCtL Retention time for TL Within 40sec.TP Peak temperature 260ºC(Max)tP Time for peak temperature Within 10sec.

ΔTR/Δt Temperature rising rate Under 3ºC/sec.ΔTD/Δt Temperature decreasing rate Over -3ºC/sec.

*Above conditions are for reference. Therefore, evaluate by customer’s own circuit boards and reflow furnaces before using, because stress from circuit boards and temperature variations of reflow furnaces vary by customer’s own conditions.

4-7. Cleaning after SolderingPlease follow the conditions below if the cleaning is necessary after soldering.

Solvent We recommend to use alcohols solvent such as, isopropyl alcoholsTemperature Under 30ºC within 3 minutesUltrasonic Cleaning 15W / Below 1 liter (capacity of tank)Drying Under 100ºC within 3 minutes

Stress strength according tothe mounting position:A>B>C>D

(Fig-1)

4-4. Mechanical Stress after MountingThe mechanical stress may damage the LED after Circuit Mounting, so please pay attention to the touch on

product.

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Notice

ROHM Customer Support System http://www.rohm.com/contact/

Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us.

N o t e s The information contained herein is subject to change without notice.

Before you use our Products, please contact our sales representative and verify the latest specifica-tions :

Although ROHM is continuously working to improve product reliability and quality, semicon-ductors can break down and malfunction due to various factors.Therefore, in order to prevent personal injury or fire arising from failure, please take safety measures such as complying with the derating characteristics, implementing redundant and fire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have no responsibility for any damages arising out of the use of our Poducts beyond the rating specified by ROHM.

Examples of application circuits, circuit constants and any other information contained herein are provided only to illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production.

The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM or any other parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of such technical information.

The Products are intended for use in general electronic equipment (i.e. AV/OA devices, communi-cation, consumer systems, gaming/entertainment sets) as well as the applications indicated in this document.

The Products specified in this document are not designed to be radiation tolerant.

For use of our Products in applications requiring a high degree of reliability (as exemplified below), please contact and consult with a ROHM representative : transportation equipment (i.e. cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety equipment, medical systems, servers, solar cells, and power transmission systems.

Do not use our Products in applications requiring extremely high reliability, such as aerospace equipment, nuclear power control systems, and submarine repeaters.

ROHM shall have no responsibility for any damages or injury arising from non-compliance with the recommended usage conditions and specifications contained herein.

ROHM has used reasonable care to ensur the accuracy of the information contained in this document. However, ROHM does not warrants that such information is error-free, and ROHM shall have no responsibility for any damages arising from any inaccuracy or misprint of such information.

Please use the Products in accordance with any applicable environmental laws and regulations, such as the RoHS Directive. For more details, including RoHS compatibility, please contact a ROHM sales office. ROHM shall have no responsibility for any damages or losses resulting non-compliance with any applicable laws or regulations.

When providing our Products and technologies contained in this document to other countries, you must abide by the procedures and provisions stipulated in all applicable export laws and regulations, including without limitation the US Export Administration Regulations and the Foreign Exchange and Foreign Trade Act.

This document, in part or in whole, may not be reprinted or reproduced without prior consent of ROHM.

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Mouser Electronics

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